12259 CTF shouldn't assume enum size

*** 8,18 ****
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2019, Joyent, Inc.
   */
  
  /*
   * To perform a merge of two CTF containers, we first diff the two containers
   * types. For every type that's in the src container, but not in the dst
--- 8,18 ----
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2020 Joyent, Inc.
   */
  
  /*
   * To perform a merge of two CTF containers, we first diff the two containers
   * types. For every type that's in the src container, but not in the dst
*** 338,356 ****
          int flags;
          const ctf_type_t *tp;
          const char *name;
          ctf_id_t enumid;
          ctf_merge_enum_t cme;
  
          tp = LCTF_INDEX_TO_TYPEPTR(cmp->cm_src, id);
-         name = ctf_strraw(cmp->cm_src, tp->ctt_name);
          if (CTF_INFO_ISROOT(tp->ctt_info) != 0)
                  flags = CTF_ADD_ROOT;
          else
                  flags = CTF_ADD_NONROOT;
  
!         enumid = ctf_add_enum(cmp->cm_out, flags, name);
          if (enumid == CTF_ERR)
                  return (enumid);
  
          cme.cme_fp = cmp->cm_out;
          cme.cme_id = enumid;
--- 338,359 ----
          int flags;
          const ctf_type_t *tp;
          const char *name;
          ctf_id_t enumid;
          ctf_merge_enum_t cme;
+         size_t size;
  
          tp = LCTF_INDEX_TO_TYPEPTR(cmp->cm_src, id);
          if (CTF_INFO_ISROOT(tp->ctt_info) != 0)
                  flags = CTF_ADD_ROOT;
          else
                  flags = CTF_ADD_NONROOT;
  
!         name = ctf_strraw(cmp->cm_src, tp->ctt_name);
!         size = ctf_get_ctt_size(cmp->cm_src, tp, NULL, NULL);
! 
!         enumid = ctf_add_enum(cmp->cm_out, flags, name, size);
          if (enumid == CTF_ERR)
                  return (enumid);
  
          cme.cme_fp = cmp->cm_out;
          cme.cme_id = enumid;